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taskwarrior: asynchronous; #213 enhanced
[etc/awesome.git] / widgets / base.lua
1
2 --[[
3                                                   
4      Licensed under GNU General Public License v2 
5       * (c) 2014, Luke Bonham                     
6                                                   
7 --]]
8
9 local newtimer     = require("lain.helpers").newtimer
10 local read_pipe    = require("lain.helpers").read_pipe
11 local wibox        = require("wibox")
12 local setmetatable = setmetatable
13
14 -- Basic template for custom widgets
15 -- lain.widgets.base
16
17 local function worker(args)
18     local base     = {}
19     local args     = args or {}
20     local timeout  = args.timeout or 5
21     local cmd      = args.cmd or ""
22     local settings = args.settings or function() end
23
24     base.widget = wibox.widget.textbox()
25
26     function base.update()
27         output = read_pipe(cmd)
28         if output ~= base.prev then
29             widget = base.widget
30             settings()
31             base.prev = output
32         end
33     end
34
35     newtimer(cmd, timeout, base.update)
36
37     return setmetatable(base, { __index = base.widget })
38 end
39
40 return setmetatable({}, { __call = function(_, ...) return worker(...) end })